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COMET Phase-I Technical Design Report

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arxiv 1812.09018 v3 pith:VM6DMNBQ submitted 2018-12-21 physics.ins-det hep-ex

The COMET Collaboration: R. Abramishvili , G. Adamov , R. R. Akhmetshin , A. Allin , J. C. Angélique , V. Anishchik , M. Aoki , D. Aznabayev
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I. Bagaturia G. Ban Y. Ban D. Bauer D. Baygarashev A. E. Bondar C. Cârloganu B. Carniol T. T. Chau J. K. Chen S. J. Chen Y. E. Cheung W. da Silva P. D. Dauncey C. Densham G. Devidze P. Dornan A. Drutskoy V. Duginov Y. Eguchi L. B. Epshteyn P. Evtoukhovich S. Fayer G. V. Fedotovich M. Finger Jr M. Finger Y. Fujii Y. Fukao J. L. Gabriel P. Gay E. Gillies D. N. Grigoriev K. Gritsay V. H. Hai E. Hamada I. H. Hashim S. Hashimoto O. Hayashi T. Hayashi T. Hiasa Z. A. Ibrahim Y. Igarashi F. V. Ignatov M. Iio K. Ishibashi A. Issadykov T. Itahashi A. Jansen X. S. Jiang P. Jonsson T. Kachelhoffer V. Kalinnikov E. Kaneva F. Kapusta H. Katayama K. Kawagoe R. Kawashima N. Kazak V. F. Kazanin O. Kemularia A. Khvedelidze M. Koike T. Kormoll G. A. Kozlov A. N. Kozyrev M. Kravchenko B. Krikler G. Kumsiashvili Y. Kuno Y. Kuriyama Y. Kurochkin A. Kurup B. Lagrange J. Lai M. J. Lee H. B. Li R. P. Litchfield W. G. Li T. Loan D. Lomidze I. Lomidze P. Loveridge G. Macharashvili Y. Makida Y. J. Mao O. Markin Y. Matsuda A. Melkadze A. Melnik T. Mibe S. Mihara N. Miyamoto Y. Miyazaki F. Mohamad Idris K. A. Mohamed Kamal Azmi A. Moiseenko M. Moritsu Y. Mori T. Motoishi H. Nakai Y. Nakai T. Nakamoto Y. Nakamura Y. Nakatsugawa Y. Nakazawa J. Nash H. Natori V. Niess M. Nioradze H. Nishiguchi K. Noguchi T. Numao J. O'Dell T. Ogitsu S. Ohta K. Oishi K. Okamoto T. Okamura K. Okinaka C. Omori T. Ota J. Pasternak A. Paulau D. Picters V. Ponariadov G. Quémener A. A. Ruban V. Rusinov B. Sabirov H. Sakamoto P. Sarin K. Sasaki A. Sato J. Sato Y. K. Semertzidis N. Shigyo Dz. Shoukavy M. Slunecka D. Stöckinger M. Sugano T. Tachimoto T. Takayanagi M. Tanaka J. Tang C. V. Tao A. M. Teixeira Y. Tevzadze T. Thanh J. Tojo S. S. Tolmachev M. Tomasek M. Tomizawa T. Toriashvili H. Trang I. Trekov Z. Tsamalaidze N. Tsverava T. Uchida Y. Uchida K. Ueno E. Velicheva A. Volkov V. Vrba W. A. T. Wan Abdullah P. Warin-Charpentier M. L. Wong T. S. Wong C. Wu T. Y. Xing H. Yamaguchi A. Yamamoto M. Yamanaka T. Yamane Y. Yang T. Yano W. C. Yao B. Yeo H. Yoshida M. Yoshida T. Yoshioka Y. Yuan Yu. V. Yudin M. V. Zdorovets J. Zhang Y. Zhang K. Zuber
This is my paper · ORCID
classification physics.ins-dethep-ex
keywords backgroundexperimentcometconversioneventsphase-iwilldesign
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

The Technical Design for the COMET Phase-I experiment is presented in this paper. COMET is an experiment at J-PARC, Japan, which will search for neutrinoless conversion of muons into electrons in the field of an aluminium nucleus ($\mu-e$ conversion, $\mu^- N \to e^- N$); a lepton flavor violating process. The experimental sensitivity goal for this process in the Phase-I experiment is $3.1\times10^{-15}$, or 90 % upper limit of branching ratio of $7\times 10^{-15}$, which is a factor of 100 improvement over the existing limit. The expected number of background events is 0.032. To achieve the target sensitivity and background level, the 3.2 kW 8 GeV proton beam from J-PARC will be used. Two types of detectors, CyDet and StrECAL, will be used for detecting the \mue conversion events, and for measuring the beam-related background events in view of the Phase-II experiment, respectively. Results from simulation on signal and background estimations are also described.

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